package cn.ren.controller;

import cn.ren.constant.MessageConstant;
import cn.ren.entity.Result;
import cn.ren.service.MemberService;
import cn.ren.service.ReportService;
import cn.ren.service.SetMealService;
import com.alibaba.dubbo.config.annotation.Reference;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * @program: itcast_health
 * @description:
 * @author: ren
 * @create: 2020-03-04 22:03
 **/
@RestController
@RequestMapping("/report")
public class ReportController {
    @Reference
    private MemberService memberService;
    @Reference
    private SetMealService setMealService;
    @Reference
    private ReportService reportService;

    /**
     * 获取会员数量的月增长报告
     * @return
     */
    @RequestMapping("/getMemberReport")
    public Result getMemberReport(){
        //获取一个calendar对象
        Calendar calendar = Calendar.getInstance();
        //时间回到12个月前
        calendar.add(calendar.MONTH,-12);
        //获取这12个月，每个月的年月字符串,保存到list里
        List<String> list = new ArrayList<>();
        for (int i = 0; i < 12; i++) {
            calendar.add(calendar.MONTH,1);
            Date time = calendar.getTime();
            String date = new SimpleDateFormat("yyyy.MM").format(time);
            list.add(date);
        }
        //根据list日期，去查每月的数量
        List<Integer> memberCount = memberService.findMemberCountByMonth(list);
        //以map的方式返回数据
        Map<String,Object> map = new HashMap<>();
        map.put("months",list);
        map.put("memberCount",memberCount);
        return new Result(true, MessageConstant.GET_MEMBER_NUMBER_REPORT_SUCCESS,map);
    }

    /**
     * 查询套餐预约的比例（饼状图）数据
     * @return
     */
    @RequestMapping("/getSetmealReport")
    public Result getSetmealReport(){
        //通过分组查询，可以获取套餐名称+数量的list
        List<Map<String,Object>> list = null;
        try {
            list = setMealService.findOrderCountGroupBySetmeal();
        } catch (Exception e) {
            e.printStackTrace();
            return new Result(false,MessageConstant.GET_SETMEAL_COUNT_REPORT_FAIL);
        }
        //从该map里取出name到list集合里。
        List<String> nameList = new ArrayList<>();
        for (Map<String, Object> map : list) {
            String name = (String)map.get("name");
            nameList.add(name);
        }
        //将返回数据封装到map里
        Map map = new HashMap();
        map.put("setmealNames",nameList);
        map.put("setmealCount",list);
        return new Result(true,MessageConstant.GET_SETMEAL_COUNT_REPORT_SUCCESS,map);
    }

    /**
     * 获取商业报告数据
     * @return
     */
    @RequestMapping("/getBusinessReportData")
    public Result getBusinessReportData(){
        try {
            Map<String, Object> map = reportService.getBusinessReportData();
            return new Result(true,MessageConstant.GET_BUSINESS_REPORT_SUCCESS,map);
        } catch (Exception e) {
            e.printStackTrace();
            return new Result(false,MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }

    /**
     * 通过poi将数据写到excel，然后发送到页面下载
     */
    @RequestMapping("/exportBusinessReport")
    public Result exportBusinessReport(HttpServletRequest request, HttpServletResponse response){

        try {
            //获取数据
            Map<String, Object> map = reportService.getBusinessReportData();
            //取出数据
            String reportDate = (String) map.get("reportDate");
            Integer todayNewMember = (Integer) map.get("todayNewMember");
            Integer totalMember = (Integer) map.get("totalMember");
            Integer thisWeekNewMember = (Integer) map.get("thisWeekNewMember");
            Integer thisMonthNewMember = (Integer) map.get("thisMonthNewMember");
            Integer todayOrderNumber = (Integer) map.get("todayOrderNumber");
            Integer thisWeekOrderNumber = (Integer) map.get("thisWeekOrderNumber");
            Integer thisMonthOrderNumber = (Integer) map.get("thisMonthOrderNumber");
            Integer todayVisitsNumber = (Integer) map.get("todayVisitsNumber");
            Integer thisWeekVisitsNumber = (Integer) map.get("thisWeekVisitsNumber");
            Integer thisMonthVisitsNumber = (Integer) map.get("thisMonthVisitsNumber");
            List<Map> hotSetmeal = (List<Map>) map.get("hotSetmeal");

            //获取template目录下的excel文件
            String templatePath = request.getSession().getServletContext().getRealPath("/template")
                    + File.separator + "report_template.xlsx";
            //将数据写入到excel中
            //创建excel表
            XSSFWorkbook workbook = new XSSFWorkbook(new FileInputStream(new File(templatePath)));
            //创建sheet
            XSSFSheet sheet = workbook.getSheetAt(0);
            //根据excel模板，指定行、列添加数据
            XSSFRow row = sheet.getRow(2);
            row.getCell(5).setCellValue(reportDate);//日期
            row = sheet.getRow(4);
            row.getCell(5).setCellValue(todayNewMember);//新增会员数(本日)
            row.getCell(7).setCellValue(totalMember);//总会员数
            row = sheet.getRow(5);
            row.getCell(5).setCellValue(thisWeekNewMember);//本周新增会员数
            row.getCell(7).setCellValue(thisMonthNewMember);//本月新增会员数
            row = sheet.getRow(7);
            row.getCell(5).setCellValue(todayOrderNumber);//今日预约数
            row.getCell(7).setCellValue(todayVisitsNumber);//今日到诊数
            row = sheet.getRow(8);
            row.getCell(5).setCellValue(thisWeekOrderNumber);//本周预约数
            row.getCell(7).setCellValue(thisWeekVisitsNumber);//本周到诊数
            row = sheet.getRow(9);
            row.getCell(5).setCellValue(thisMonthOrderNumber);//本月预约数
            row.getCell(7).setCellValue(thisMonthVisitsNumber);//本月到诊数
            int rowNum = 12;
            //遍历将热门套餐写到excel
            for(Map mealMap : hotSetmeal){//热门套餐
                String name = (String) mealMap.get("name");
                Long setmeal_count = (Long) mealMap.get("setmeal_count");
                BigDecimal proportion = (BigDecimal) mealMap.get("proportion");
                row = sheet.getRow(rowNum ++);
                row.getCell(4).setCellValue(name);//套餐名称
                row.getCell(5).setCellValue(setmeal_count);//预约数量
                row.getCell(6).setCellValue(proportion.doubleValue());//占比
            }
            //通过response输出流，在页面进行下载excel文件
            ServletOutputStream out = response.getOutputStream();
            response.setContentType("application/vnd.ms-excel");
            response.setHeader("content-Disposition",
                    "attachment;filename=report.xlsx");
            workbook.write(out);
            //关闭资源
            out.flush();
            out.close();
            workbook.close();
            return null;
        } catch (Exception e) {
            e.printStackTrace();
            return new Result(false, MessageConstant.GET_BUSINESS_REPORT_FAIL);
        }
    }
}
